Cydia Tweak DoNotDisturb 1.0 has been release, DoNotDisturb 1.0 works with iOS 5 or higher.

DoNotDisturb adds a “Do Not Disturb“-Switch to your Notification Center. While the “Do Not Disturb“-Mode is enabled you won’t see any Notification Banners or Sounds. The Switch is added within a Notification Center Widget. If the Widget does not appear after install, go into the Settings App and enable it manually from “Notifications”.